Hello there, I recently purchased an Acer Revo RL70, which has the AMD E450 processor with intergrated AMD Radeon HD6320 graphics. It is currently running on Windows 8

Because of it's low power usage, I would like this PC to run 24/7, but I currently wake up each morning to find that it is fully powered down. It seems to power itself down after 1.5 - 2 hours of inactivity.

After checking event viewer, under the 'system' tab I noticed 3 events precede this unrequested shutdown. The 3 events are all identical, and take place at the same time. The event is:

Info - User32 Event ID: 1074 Task catagory: noneThe process c:windows\system32\winlogon.exe has initiated the shutdown of <pcname> on behalf of user/<pc name> for the following reason - no title for this reason could be found.

After looking online atieclxx.exe (the program that is initiating usermodepowerservice) is an ATI graphics program. Would there be any reason why this .exe would want to shutdown my PC? Can this be disabled?

I have checked driver versions over on the Acer Revo support site, and my BIOS seems up to date. I have just tried reinstalling Windows, and have the same problem.